How does our vision work?

It all depends on light. Our eyes are balls, made such that they receive light rays on the front side and bend them (refracth Contacts or LASIK?em) to focus on the inside back surface of the eye (the retina). It’s very like the way a traditional camera directs light onto a film inside it.

So the object from which the light rays have been reflected to our eyeballs shows up as a little image on the retina, a tiny upside down picture of itself. There’s a large nerve at the back of each eye called the optic nerve which then transmits this image information to our brain and our brain understands and interprets it and tells us, “That there is a tree!”

So why, for some of us, does that tree look blurry or indistinct or distorted? Because the image information sent by the optic nerve was deficient in some way so the brain didn’t receive enough information to interpret correctly, and maybe it told us, “That there is a telegraph pole!”

That happens when the cornea isn’t perfectly round and the light rays are not refracted correctly, so they don’t form a perfect image. This is where LASIK surgery enters the picture, so to speak.